What happened to the Sooners in a 70-55 loss to San Diego State that booted them from the NCAA Tournament in just 40 minutes? Why did the Sooners, who were a team that shot around 50 percent all season, end the season in a scoring drought? What happened from beyond the arc? And what happened to anyone backing up Romero Osby?

Oklahoma's Amath M'Baye (22) hugs San Diego State's JJ O'Brien (20) as Oklahoma's Romero Osby (24) walks away after a game between the University of Oklahoma and San Diego State in the second round of the NCAA men's college basketball tournament at the Wells Fargo Center in Philadelphia, Friday, March 22, 2013. San Diego State beat OU, 70-55. Photo by Nate Billings, The Oklahoman

“Oh, I mean, I don't know,” junior Amath M'Baye said about OU's struggle from beyond the arc. “I don't know.”

“I don't really know how to explain it right now,” senior point guard Sam Grooms, who sat the bench in the second half, said about what went wrong. “I don't really know what to say about it.”

Here's what the stats say.

In its last three games, Oklahoma didn't shoot above 40 percent, going 24-of-66 against TCU, 24-of-63 against Iowa State and 23-of-58 against San Diego State.

Does it get better from beyond the arc? Nope. Oklahoma's best in those final three games was 23.8 percent from 3-point range. The Sooners went 0-of-16 against TCU, 3-of-18 against Iowa State and 5-of-21 against San Diego State.

On Friday at the Wells Fargo Center, Romero Osby went 9-of-15 from the floor. The rest of the team went 14-of-43.

“That's the game,” Osby said. “That's the game that we love. We hate it sometimes, but we always love it, and sometimes things just don't go your way. I think that's pretty much what it was.”

Here's what else didn't go the Sooners' way — rebounding. The Sooners (20-12) were ahead slightly on the boards at halftime, 19-17. They ended the game grabbing only 10 more boards than what they went into halftime with. The Aztecs finished with 40 rebounds, 29 defensively.